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Switch name Cherry MX equivalent Switch Type Actuation force Tactile force Actuation point Total travel Product code Durability (actuations) Cherry: Cherry: Black [1] Cherry MX Black: Linear: 0.60 N: N/A: 2.0 mm: 4.0 mm: MX1A-11xx >100 million Cherry: Cherry: Red [2] Cherry MX Red: Linear: 0.45 N: N/A: 2.0 mm: 4.0 mm: MX1A-L1xx >100 million ...
Loss of tactile feel means the user will not receive a ‘click’ feedback during actuation. Snap ratio is calculated as the difference between the actuation force and the contact force of a switch divided by the actuation force. The actuation force is the force required to collapse the membrane of a rubber switch, and the contact force is the ...
The keys are attached to the keyboard via two plastic pieces that interlock in a "scissor"-like fashion and snap to the keyboard and the keycap. These keyboards are generally quiet and the keys require little force to press. Scissor-switch keyboards are typically slightly more expensive.
A buckling spring is a type of keyswitch mechanism, popularized by IBM's keyboards for the PC, PC/AT, 5250/3270 terminals, PS/2, and other systems. It was used by IBM's Model F keyboards (for instance the AT keyboard), and the more common Model M. It is described in U.S. patent 4,118,611 (Model F) and U.S. patent 4,528,431 (Model M), both now ...
The switch comprised two contacts splayed apart by a spacer; the contacts are bent in such away to move together as the spacer is depressed along with the key, until a connection between the contacts is made. Its rated actuation force of 2 oz (57 g) was relatively low, as was its key travel of 0.14 in (3.6 mm).
Cherry Mechanical Low-profile (ML) switches are available in a tactile variant, with force and operating characteristics similar to that of Cherry MX Brown switches, but with shortened travel. The rated service life of ML switches is 20 million keystrokes, approximately 1 ⁄ 5 that of the rated MX life. [ 24 ]
All such keyboards are characterized by having each key surrounded (and held in place) by a perforated plate, so there is a space between the keys. Unlike the membrane keyboard, where the user presses directly onto the top membrane layer, this form of chiclet keyboard places a set of moulded rubber keys above this. With some key designs, the ...
Model M keyboards are a group of computer keyboards designed and manufactured by IBM starting in 1985, and later by Lexmark International, Maxi Switch, and Unicomp. The keyboard's different variations have their own distinct characteristics, with the vast majority having a buckling-spring key design and uniform profile, swappable keycaps .